For the U.S., Kerry is to sign the agreement Friday and then President Obama will ratify it before he leaves office in December, a senior U.S. official told CBS News in a conference call this week.
Time Frame. The average dolphin species can stay underwater for as long as eight to 10 minutes; some can remain submerged while holding their breath for 15 minutes. Dolphins breathe through their blowhole, which has a muscular flap that covers it when they go under water, keeping water out of their lungs. Size.
1 Aleix Segura Vendrell, who set a world record for holding his breath underwater for 24 minutes and 3 seconds, is a proponent of this very technique.  Don't hold air in your cheeks. This method is meant for an air reserve, which requires letting go of the air in your lungs and switching it with the air in your cheeks.